Hi Martijn,
Thank you very much for your super and super fast response!!
In fact, I did only learn about the opaque term from the Andreas Studenski mail you quoted.
Trying a quick fix, I did check Settings -> Edit Global preferences (advances) "Remove signature" unchecking "inherit". That will hopefully help with new mails but not with the hundreds of mails imported from Exchange suffering from the issue.
I will also post the issue to the Kopano forum. There, the term "opaque" was used eleven times, but in other contexts. I very much hope that I will be able to have Felix Bartels or others understand what we are talking about.
Regards,
Michael
P.S: As both ciphermail and Kopano are Dutch, I shall say that being from Hamburg and living in Düsseldorf part time, I very much envy NL!
-----Ursprüngliche Nachricht-----
> Von: Martijn Brinkers <martijn(a)ciphermail.com>
> Gesendet: Mittwoch 17 März 2021 18:09
> An: users(a)lists.ciphermail.com
> CC: Prof. Dr. Michael Schefczyk <michael(a)schefczyk.net>
> Betreff: Re: [CipherMail User] Decrypted mail blank in mail client
>
> Hi Michael,
>
> The most likely reason you cannot red the email is that the email was
> first opaquely signed and then encrypted (probably by Outlook).
>
> CipherMail removes the encryption but keeps the signed email. If the
> email was opaquely signed (which is the default with Outlook when the
> email is encrypted), you need an mail client which can handle opaquely
> signed email. If you email client cannot handle opaquely signed email,
> your best option for now is to have the gateway remove the signature
> (see settings).
>
> For a recent discussion about a similar issue see
>
>
> https://lists.ciphermail.com/hyperkitty/list/users@lists.ciphermail.com/thr…
>
> I will spend some time investigating two options: is it possible to
> convert an opaquely signed email to a clear signed email without
> breaking the signature or, add an option to only remove the signature
> if the email is opaquely signed
>
> Kind regards,
>
> Martijn Brinkers
>
> --
> CipherMail email encryption
> Email encryption with support for S/MIME,
> OpenPGP, PDF Messenger and Webmail Messenger
>
> On Wed, 2021-03-17 at 17:01 +0000, Prof. Dr. Michael Schefczyk via
> Users wrote:
> > Dear All,
> >
> > For SOHO purposes, I have been using a chiphermail gateway for a long
> > time, traditionally in front of an Exchange server. Recently, I did
> > swich to Kopano - please feel free to guess why.
> >
> > There was one problem with decytped mails that annoyed me with
> > Exchange but that is more critical with Kopano and I am unable to
> > describe it adequately to Kopano. It might have to do with opaque
> > signing or it might have other reasons.
> >
> > When I receive an SMIME-encrypted e-mail, the gateway does decrypt
> > it. With Exchchange, the behavior was:
> > - decrypted message was fully visible in outlook - one could work
> > with it just as expected
> > - on Android (LineageOS, standard mail client), the decrypted message
> > was marked as encrypted and not presentable despite the fact that it
> > was in fact decrypted.
> > I found that annoying, but I could stand that. If needed, I did use
> > OWA.
> >
> > With Kopano, the behavior is:
> > - decrypted message is shown blank in Kopano client. When downloading
> > in .eml format, it can be viewed (with Outlook, for example)
> > - on Android, the decrypted message is also shown blank. Just an
> > smime.p7m enclosure is visible.
> >
> > I would very much welcome, if Martijn or someone else could point me
> > to the right direction to resolve this issue. Any help in describing
> > the issue to Kopano and/or in understanding which features might have
> > to be enabled in php and/or apache in use would be great.
> >
> > Thanks & Regards,
> >
> > Michael
> > ____________________________________________________________
> > Technische Universität Dresden
> > Fakultät Wirtschaftswissenschaften
> > Lehrstuhl für Entrepreneurship und Innovation
> > Prof. Dr. Michael Schefczyk
> > D-01062 Dresden
> >
> > Fon: +49-3 51-4 63-3 68 81
> > Fax: +49-3 51-4 63-3 68 83
> > www.gruenderlehrstuhl.de
>
>
>
Dear All,
For SOHO purposes, I have been using a chiphermail gateway for a long time, traditionally in front of an Exchange server. Recently, I did swich to Kopano - please feel free to guess why.
There was one problem with decytped mails that annoyed me with Exchange but that is more critical with Kopano and I am unable to describe it adequately to Kopano. It might have to do with opaque signing or it might have other reasons.
When I receive an SMIME-encrypted e-mail, the gateway does decrypt it. With Exchchange, the behavior was:
- decrypted message was fully visible in outlook - one could work with it just as expected
- on Android (LineageOS, standard mail client), the decrypted message was marked as encrypted and not presentable despite the fact that it was in fact decrypted.
I found that annoying, but I could stand that. If needed, I did use OWA.
With Kopano, the behavior is:
- decrypted message is shown blank in Kopano client. When downloading in .eml format, it can be viewed (with Outlook, for example)
- on Android, the decrypted message is also shown blank. Just an smime.p7m enclosure is visible.
I would very much welcome, if Martijn or someone else could point me to the right direction to resolve this issue. Any help in describing the issue to Kopano and/or in understanding which features might have to be enabled in php and/or apache in use would be great.
Thanks & Regards,
Michael
____________________________________________________________
Technische Universität Dresden
Fakultät Wirtschaftswissenschaften
Lehrstuhl für Entrepreneurship und Innovation
Prof. Dr. Michael Schefczyk
D-01062 Dresden
Fon: +49-3 51-4 63-3 68 81
Fax: +49-3 51-4 63-3 68 83
www.gruenderlehrstuhl.de
